Typewriting machine



May 2, 1939. H. c. YAEGER TYPEWRITING MACHINE 5 Sheets-Shee t 1 FiledApril 19, 1937 1 @N mw w N y 2, 1939- H. c. YAEGER I 2,156,614

TYPEWRITING MACHINE Filed April 19, 1937 5 Sheets-Sheet 2 llwf/vrok:

ATTORNEY.

May 2, 1939. H.. c. YAEGER TYPEWRITING MACHINE a Fild April 19, 1937 5Sheets-Sheet 3 ATTORNEY.

H. C. YAEGER TYPEWRIIING MACHINE May 2, 1939.

- Filed April' 19, 1937 5 Sheets-Sheet 4 ATTORNEY.

' y 1939. H. c. YAEGER TYPEWRITING MACHINE Filed April 19, 1937 5Sheets-Sheet 5 Patented May 2, 1939 UNETE 2,156,614 TYPEWRITING MACHINEHarry 0.

Yaeger, West Hartford, to Underwood Elliott Fisher C'onn., assignorCompany, New

York, N. Y., a corporation of Delaware Application April 19, 1937,

43 Claims.

This invention relates to typewriters and more especially to those inwhich the type-system includes type-carriers which are thrust rearwardlyagainst a rotatable platen when the key-levers 5 are depressed. Thelatter class of typewriters is shown in patent to Going, 1,604,640. Inthe typesystem itself precision is of the essence, and forward andrearward relative adjustability of the type and the platen needs to beprovided for the entire type-system, both individually and collectively.

Each unit of the type-system includes a supporting bracket on which arepivoted guiding arms for a type-bar slide.

The adjustment of the entire type-system collec'tively relatively to theplaten is shown in patent to Going, 1,883,698, in which aplaten-carriage support is adjustable fore and aft.

A feature of the invention is an improved mounting, consisting of aunitary casting providing two concentric arcuate supports for thebrackets of the type-system, the rear support having not only a comb forguiding the lower edges of the type-bar slides, but having also theforward arcuate ledge, on which the rear ends of the brackets arehooked, and which may be easily formed on a lathe. According to thepresent improvements, by mounting on the rear arcuate support of theunitary casting a depending comb, below and to the rear of the arcuateledge, the slots thereof may be cut on a milling machine. The improveddepending comb displays rigidity of the vertical mounting of the bracketof each type-unit, and so improves the perform.- ance of eachtype-action, by preventing friction and binding.

The fact that the entire type-system is adjustable forwards andbackwards as a unit adds to the advantages accruing from a unitaryintegral casting for making the adjustment with reference to thetypewriter frame because the rigidity and immovability inherent in theunitary casting assure the continuity of predetermined relationships ofparts of and among the units of the type-system.

A relative transverse adjustment of the typewriter frame and thetype-system support is made possible, as well as the primary forward andbackward adjustment which latter carries the type-system toward or awayfrom the platen. The transverse adjustment of the type-system support onthe frame is effected by four screws which engage the inner walls of theframe. By turning back the screws the entire support and type-system canbe lifted up and out of the frame Serial No. 137,702

or reinserted therein. A transverse adjustment of the support may bemade, and yet the support may be locked tightly on the frame.

A -novel' manually operated device is provided which assures anequalized positioning of both outer walls of the type-system support,and includes a transverse rod rotatably mounted in the frame of thetypewriter and a handle mounted in an accessible place on the outer wallof the typewriter for rotating the rod. Each of two eccentric camsengages the head of a forwardly and rearwardly adjustable screw mountedon the front of the support at either side. Springs tend to hold thecams in continuous engagement with the screw heads. In a modificationinclined cams are used.

The adjustment of the type-system support carries forwardly orrearwardly the ribbon cups formed in the top thereof. Elongatedapertures, in the bottom of each cup, admit the vertical shafts for theribbon spools in any position of adjustment.

Another feature of the invention is a simple device for use with aneccentric cam to prevent any transverse movement between the caman-d thepart cammed. A flat spring is mounted across the cam in the transverseplane and is fixed on the part which mounts the rotatable cam. Thefriction acts on the fiat-spring interponent and no transverse motion istransmitted to the part cammed. In using this improvement between aplaten-carriage and a type-system only horizontal motion can betransmitted between a type and the platen but otherwise relativevertical motion 'might throw the type and the platen out of properadjustment, causing imprinting below or above the line.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a side elevation partly in section.

Figure 2 is a perspective view showing the mounting for an eccentriccam, with the cam and its supporting rod offset from the frame.

Figure 3 is a perspective view, with parts in section, of the top of theframe and the adjustable and removable support for the type-bar systemmounted thereon.

Figure 4 is a top plan view, parts broken out and sectioned, showing theadjusting rod partly removed from the frame.

Figure 5 is a front elevation,'parts broken out and sectioned, showingthe construction for slidably and releasably mounting the support on theframe.

Figure 7 is a vert1cal section through the midrear of the v Figure 8 isa vertical section through the middie of the unitary type-system supportshowing the relationship of the cutting tool to the unitary casting.

Figure 9 shows the type-system support and the supported type-actionparts lifted up from the typewriter frame and clear of the universal barand the fasteners on the type-bars.

Figure 10 is a plan view showing a modification of the type adjustingdevice shown .in Figure 4.

Figure 11 is a sectional elevation looking towards the left inclinedcam.

Figure 12 is a perspective view of the centrally positioned actuatinghandle, the pinion,and racks on each arm mounting an inclined cam at theextremity.

Figure 13 is a central vertical section of the structure shown in Figure12, from the right.

Figure 14 indicates the five lockable positions of the left inclinedcam.

The typewriter shown has a frame ll sup- 7 ported on feet 52 and acarriage l3 mounted by ball-bearings I d on a vertically shiftahle tracki5, and which rotatably supports a platen I 6. Screws Ii horizontallypivot the track l5 on the rear end of a shift-lever I8 pivotallymounted, together with a cross-piece 49, on the top of an upright 2i]supported on a key-lever bracket 22 fastened in the frame H by screws23. A brace 24 is mounted in the carriage l3 and slidably engages anupright arm 25 which resists rearward yielding of the carriage I3 underpressure from a type 26 carried by type-heads 21 of a type-carrier 28,which is slidable forwards and rearwards and upwardly or downwardlyaccording to which key-lever 29 may be depressed under the quaternatecontrol shown in the patent to Going, 1,604,640. Each key-lever 29 ispivotally mounted at the rear end in a slot 30 on a pivot rod 32 and aspring 33 .adjustable on the toothed rack 34 tends to maintain the lever29 in the upper position.

Near the top of the frame I I on each side is an inwardly turned ledge35 as shown in Figure 4, the inner top surface of which forms a flat butupwardly and rearwardly inclined track 36 a bit lower than the top ofthe rest of the ledge 35 and bounded by an outer vertical wall 31. Undereach track 36 each ledge has a downwardly and outwardly projecting wall38 in the form of an inclined fiat surface.

A support 39 for the type-system is a unitary casting having on thelower surface near each outer edge and near the front and rear adepending ridge 40, four in all, the lower outer wall of which is incutperpendicularly to form a flat track 42 and to leave the lower outerwall 43 flat and perpendicular. The perpendicular distance between theouter walls of the depending ridges 40 is substantially less than thatbetween the vertical walls 31 and the perpendicular distance betweenlower outer walls 43 is substantially less than that between the inneredges of the depending ledges 34, the difference in each case being thesame and sufiicient to permit the lock the support 39 slidably forwardsand backwards but against lateral movement or vertical movement. Thesetting of screws 44 may be varied to adjust the support 39 laterally.

wardly and upwardly inclined walls of ridges 40.

An equal and simultaneous forward and backward adjustment of both sidesof the support 39 the by set-screws i? in the 53, one at each end of theSprings 54, one on either side, are tied, at the front to fingers 55secured by screws 56 platen H3, or permit platen under tension fromstrong springs 54.

At the right end of the rod $9 is fastened one end of an arm 58 by meansof a screw 59 and on the other end of the arm 58 is mounted afingerpiece 66 having a pin 62 which is spring-pressed towards the sideof the typewriter. A disk 63 is mounted on and held against the outsideof the frame H by the arm 58 and a screw 64 and has radially disposedholes 65 for engaging the pin 62 and locking the arm 58 in variousrotative adjustments. To adjust the arm 58 the fingerpiece 60 is pulledaway from the disk 63 to release the pin 52 from one of the holes 65.The radial disposition of holes 65 may be related to the thickness ofwork-sheets. as may be rotated in either direction. A recess sembly ofthe rod 49 from the right side and receives a hub 6| of a disk 63 whichacts as a permanent bearing after the eccentrics 48 are positioned intheir proper recesses and the hub 6| is slipped over the right end ofthe rod 49 and the screw 59 passed through the arm 58 and the disk 63into the end of this rod.

The support 39 for the type-system is a unitary casting having ribboncups 66 formed in the top wall at either side and to the rear. thecenter of each cup 56 is a forwardly and rearwardly extending aperture51 up through which projects a ribbon-spool actuating shaft 68 centrallyfixed in each aperture '57, the elongation of the apertures 61 providingfor the forward and backward adjustment of the support 39. Inneropenings 69 in the side walls of the The finger-piece corresponding cups66 permit the passage of a ribbon between the type 26 and the platen I6.

The rear of the support 39 is a downwardlyand rearwardly extendingcross-bar rectangular in cross-section to the rear vertical wall ofwhich and intermediate the ends thereof is secured an upright 12 whichsupports on its upper end a type-guide 13. The central portion 14 of thecross-bar 10 extends in a straight line for a substantial proportion ofthe total length and extends below and to the rear of any other portionof the cross-bar 10, in the form shown in the drawings, the proportionbeing one-third. The front of the casting 39 is a forwardly convexedarcuate bar having a flat top wall in which are cut a plurality ofradial slots 16, one for each unit 11 of the type-system, each unit 11comprising a bracket 18 formed to support a quaternary type-action. Theforward part of each bracket 18 comprises a flat-topped extension 19,the width of which is a bit more than the depth of a slot 16,terminating at the front in a downwardly extending finger 80 which lieswithin the spool-form head 82 of a screw 83 adjustable forwards andbackwards in one of the screw-holes 84 in the front of the arcuate bar15. A plate 85 overlies each part 19 and a so 86 locks the bracket 18 inthe bar 15, by means of the plate 85.

A second concentric arcuate bar 81 lies to the rear of the arcuate bar15, the top of which is lower than a plane through the bottoms of theslots 16, and the cutting of these slots is easily efiected on a millingmachine. The upper part of the bar 91 forms a comb of radial slots 88for guiding the lower ends of the type-carriers 28. The front wall ofthe bar 81 is undercut to form a fiat arcuate ledge 99, this part of thecasting being easily accessible to a planing machine withoutinterference of any other part of thecasting 39. A hook 90 formed on theupper rear end of each bracket 19 engages the ledge 89 and supports thebrackets 18 in any adjusted position.

Referring to Figure 8 a cutter I52 is supported on a milling machine(not shown) by a hub I53 keyed on a shaft I94. It is clear also whyslots (as formerly cut) can not be cut in the forward lower arcuate edgeof the ledge 89 of a single, unitary casting 39; the shaft I54 wouldinterfere with the depending ridges 40 and other parts of the support 39and prohibit the insertion of the cutting tool, necessitating the makingof the type-action support 39 with a separable rear bar 81. Thedepending comb slots 95, however, are

easily cut, the unitary construction giving a great saving in the costof manufacture. The casting 39 has straight inner side walls I8Iradiating-from the geometrical center of the arcuate bars 15, 81 or froma point in advance thereof. The parts of the casting 39 are all sorelated that every part is accessible for machining operation inmanufacture.

The bottom of the bar 81 has an arcuate depending ridge 92 in which arecut radial slots 93 to slots 16 and which receive a front end of eachbracket 18 to support it rigidly in a vertical plane. No other part ofthe casting 39interferes so that the radial slots 93 are easily cut witha milling machine. A casting 94 has two combs 95, 96 providingconcentric slots for guiding the top edges of type-carriers 28 towardsand away from the platen I6 and is fixed on the support 39 by means ofthe screw-holes 9 I.

The bracket 18 is shown with a quaternary typeaction for swinging theupper type-head 21 cross-piece I mounted in the frame II.

through the type-guide 13, the quaternary typeaction for moving thelower type-head 21through the type-guide 13 lying to the rear but notbeing shown. A link 91 is pivoted to the snap-fastener I10 at 98, thesnap-fastener I10 being secured on the side of the key-lever 29, and atthe upper end at 99 to the rear arm of a lever I00 pivoted at I0'I tothe fixed bracket 16. A stop-pin I02 fixed in the side of the bracket 18lies in a circular hole I03 in the forward part of the lever I00 andchecks the depression of a key I04 on the keylever 29. An upward pull ona link I05 pivoted at I06 to the front end of the lever I00 tilts alever I01 clockwise on pivot I09 on a bracket arm I08 to pull down on alink IIO pivoted at III to the upper end of the lever I01. The upper endof the link H0 is tied by a pivot pin II2 to the typecarrier 28. A linkH3 is secured by a pivot pin H4 to the bracket 18 and by a pivot pin II5to the rear portion of the type-carrier 28. A rearwardly extending linkI I6 is also pivoted at I I5 to the type-carrier 28 and at the rear atH1 to the upper end of an arm H8 which is pivoted at the lower end at H9to the top of the bracket 18. A momentum accelerator I20, which normallyrests on a cushion stop I" overlying plates 85, has a rearwardlyprojecting arm I22 pivotally connected at I23 to the arm II'8. An upperarm I24 of a bell-crank I80 is pivoted on the accelerator I20 at I25,the bell-crank being pivoted on the bracket 18 and having a forwardlyextending arm depressible by the lower rear edge of the lever I00, seeFigure 9, as known and used in the Underwood noiseless typewriter.Another link I26 is connected with an adjacent key-lever 29 and operatesanother quaternary type-action (not shown) pivoted on the opposite sideof the bracket 18. A forked arm I21 is connected with and depressible bythe type-action to depress an arcuate universal bar I28 pivoted at I29on an arm I30, the front end of which is pivoted at I32 in a bracket I33secured by a screw I34 to a universal bar I28 has a depending limb I36pivoted at I31 to an arm I39 fixed on a rock-shaft I39 mounted in theframe II. A cushion-stop I40 engages the top of the key-lever 29. Acanopy I42 overlies the front of the typewriter and a front cover plateI43 the front of the typewriter, all as in typewriter.

Referring to Figure 6 the left front corner of the support 39 is shownwith a headed screw 46 mounted therein. The eccentric cam 48 is mountedon the rotatable rod 49, the left end of which lies in thesemi-cylindrical bearing 53, the cam 48'being turnable in the verticalrecess 50 in the rear wall of the lug 52 mounted on the inner left wallof the frame II. A fiat spring I44 is transversely interposed betweenthe head of the screw 46 and the rear face of a cam 48, and has aforwardly and downwardly inclined bend I45 terminating in a fiatdepending part I46 and a forwardly inclined tab I41 underlying the lug52. A screw I48 passes through the depending part I46 and anchors thespring I44 in fixed position on the rear of the lug 52. A stout spring54 is tied at the rear in a depending lug 51 and at the front is loopedover a pin I49 and holds the cam 48, the spring I44 and the head of thescrew 46 in continuous contact. Any frictional binding between thesurfaces of the cam 48 and the head of the screw 46 which would tend todis.- place them transversely with reference to each other. is nowentirely eliminated because in the the Underwood noiseless improvedconstruction any frictional binding between the cam 48 and the springI44 is absorbed by the spring I44 and not transmitted to the head of thescrew 46. Therefore relative upward or cam 48 and the screw 46 at theopposite side of the typewriter.

Referring to Figure 7 the transverse operating rod 49 mounts centrallythe eccentric cam 48 and portion 14 of the casting 39 shown in Figure 3,and therefore mounting the upright 12 and the type-guide 13. The springI44 is secured by the screw I69 on the front wall of the cross-piece I59and depends from and overlies the front of the eccentric cam 48. Anadjustable screw I 6I engages the flat spring I44 on the side oppositethe cam 48 and is mounted in the upright bracket I63. A set screw I 64is mounted in the top of the bracket I 63 and engages the side of thescrew I6I. At the lower end a screw I65 holds the bracket I63 and ismounted on a forward arm I66 on a cross-piece I61, which also maysupport the case-shift frame I8, I9 in side uprights I68. The action isin Figure 5, are turned back to free the casting 39 from the frameledges 35, the casting 39 and the supported type-action 11 may be liftedup as shown in Figure 9 after the links 91 have been separated at 98from the snap-fasteners I10 and the spring 54 released from ears 51. Allof the units 11 of the quaternary type action of the Underwood standardnoiseless typewriter may be thus simultaneously lifted up as a group outof the machine or, conversely, set down into the typewriter. Parts of aquaternary type-action, not shown in Figure 1, include the bell-crankforwardly inclined stop I14 which in its upturned movement engages aforwardly inclined stop I15 formed on the forward dependency of thebracket 18. The forked arm I21 is pivoted at I12 on the bell-crank I86so that the adjustment of the supporting casting 39 forwardly andbackwardly does not practically affect the operative engagement of thearm I21 and the universal bar I28.

A coil spring I19 links the bracket 16 and the lower arm of thebell-crank I89 and tends to hold it up in the inoperative position, saidlower arm Loosening of the screws 86 and the plates 85 permits theremoval of the individual type units 19.

Referring to Figures 10, lieu of the device shown in Figure 4 foradjusting the type-action support 39 towards and away from the platenI6, a cross-piece I82 has at either end a forwardly projecting lug I83having screwholes I84 for receiving screws I85 passed through the sidesof the frame II. Formed on either end of the cross-piece I 82 isslidably mounted the outer ends of arms I 89, I90, which are twistedinto a plane parallel with the walls 181, Wedges I92 have rear cammingfaces I93 inclined inwardly, and contactable with the heads of screws46, which are in this modification and downwardly so that the flat topsof the heads are parallel with the in- The wedges I92 are mountedrespectively on the rear walls of the arms I 89, I90 by any suitablemeans such as screws I94. Proand centrally of the cross-piece I82 is apost I95 having an axial cylindrical bore A shaft I91 is held rotatablyin the post I95 by means of a circumferential groove I98 and a screwI99, the fillistered end of which is accessible outside the post I95.The inner end of the shaft I91 is out to form radial teeth 200 of thesame pitch and spacing as teeth 20I, formed in juxtaposition on theinner mounted above and below the arms I90, I89 respectively in the rearwall of 'Ihe front endof the shaft I91 passes through an 264 formedFigure 3) to increase the space between type 26 and the platen l6 (seeFigure 1). So also counterclockwise movement of the arm 205 moves thesupport 99 back in a straight line to carry the type 536 nearer theplaten I6. The spacing between the stop-holes 5, 2, 3, 4, is equal sothat the movement of a wedge I 92 is synchronously directlyproportioned, as shown in Figure 14. The heads of the screws 293 holdthe inner ends of the arms 69, 196 snugly against the back of thecross-piece I62. Screws ZIZ hold the plate I43 against lugs 213extending inwardly from the frame I l in this modification rather thanagainst the lugs 52 as shown in Figure 1. A reinforcing flange 2Henhances the rigidity of the crosspiece M2. The stop-holes I, 2, 3, 4, 5provide scale for assisting in a precise setting of the type 26 withreference to the thickness of the work-sheet used.

Variations may be resorted to within the scope of the invention, andportions of the improvements may be used without others.

platen, and a support for the type-system slidably mounted in the frameand liftable perpendicularly from the frame of the typewriter as a unitwith the type-system.

2. In a typewriter, a frame, a platen mounted for transverse movement onthe frame, a typesyst-em including type-carriers that slide rearwards'and forwards towards and away from the platen, and a support for thetype-system having opposed tracks on the outer edges slidable forwardlyand rearwardly on the frame, said support being liftable as a unit withthe type-system from the frame.

to the platen I6, according 1 system including type-carriers 3. In atypewriter, a frame, a platen mounted for transverse movement on theframe, a typesystem including type-carriers that slide rearwards andforwards towards and away from the platen, a support for the type-systemhaving outer opposed parallel tracks, parallel tracks on the frameengageable with the tracks on the support, and screws mounted on thesupport for engaging the frame and permitting forward and backwardsliding movement of the support on the frame but locking the supportagainst upward movement with reference to the frame.

4. In a typewriter, a frame, a platen mounted for transverse movement onthe frame, a typethat slide rearwards and forwards towards and away fromthe platen, a support for the type-system havin outer opposed paralleltracks, parallel tracks on the frame engageable with the tracks on thesupport, an outwardly and downwardly extending wall under each frametrack, and screws mounted on the support and engageable with each ofsaid walls and permitting forwards and backwards movement of the supporton the frame whereby lateral adjustment of the support on the frame maybe obtained, but the support is locked against upward displacement onthe frame.

5. In a typewriter, a frame, a platen mounted for transverse movement onthe frame, a typesystem including type-carriers that slide rearwards andforwards towards and away from the platen, brackets on which thetype-carriers are supported and a support for the type-system that is aunitary metal casting and comprises means for mounting the support onthe frame, and two concentric arcuate bars, the outer arcuate bar havingradial slots in the top for supporting the front ends of the bracketsand the rear arcuate bar having radial slots in the top for slidablyguiding the lower edges of the typecarriers, a front ledge forsupporting the rear ends of the brackets, and a downwardly projectingcomb of radial slots for rigidly maintaining the brackets in the uprightposition, all of said radial slots being millable on the support as aunitary casting.

6. In a typewriter, a frame, a platen mounted for transverse movement onthe frame, a typesystem including type-carriers that slide rearwards andforwards towards and away from the platen, brackets on which thetype-carriers are supported and a support for the type-system that is aunitary metal casting and comprises means for mounting the support onthe frame, two concentric arcuate bars, and a rear depending crossbarfor mounting a type-guide, the outer arcuate bar having radial slots inthe top for supporting the front ends of the brackets and the reararcuate bar having radial slots in the top for slidably guiding thelower edges of the typecarriers, a front ledge for supporting the rearends of the brackets, and a downwardly projecting comb of radial slotsfor rigidly maintaining the brackets in the vertical position, all ofsaid radial slots being millable on the support as a unitary casting.

'7. In a typewriter, a frame, a platen mounted for transverse movementon the frame, a typesystem including type-carriers that slide rearwardsand forwards towards and away from the platen, and a support for thetype-system having opposed tracks on the outer edges slidable forwardlyand rearwardly on the frame, a rod transversely and rotatably mounted inthe frame, and a pair of symmetrically positioned eccentric cams mountedon the rod, one cam engaging the support near one outer edge and theother cam engaging the support near the other outer edge.

8. In a typewriter, a frame, a platen mounted for transverse movement onthe frame, a typesystem including type-carriers that slide rearwards andforwards towards and away from the platen, a support for the type-systemhaving opposed tracks on the outer edges slidable forwardly andrearwardly on the frame, a rod transversely and rotatably mounted in theframe, a pair of symmetrically positioned eccentric cams mounted on therod, one cam engaging the support near one outer edge and the other camengaging the support near the other outer edge, and a stout springfastened near each side of the support and to the frame for holding thecams in continuous engagement with the support.

9. In a typewriter, a frame, a platen mounted for transverse movement onthe frame, a typesystem including type-carriers that slide rearwards andforwards towards and away from the platen, a support for the type-systemslidably mounted on the frame, an adjusting screw mounted on the frontwall of the support at either side, a rod transversely and rotatablymounted in the frame, a pair of symmetrically positioned eccentric camsmounted on the rod, a cam engaging each of said screws, and means forrotating the rod.

10. In a typewriter, a frame, a platen mounted for transverse movementon the frame, a typesystem including type-carriers that slide rearwardsand forwards towards and away from the platen, a support for thetype-system having opposed tracks on the outer edges and slidableforwardly and rearwardly on the frame, a rod transversely and rotatablymounted on the frame, a pair of symmetrically positioned eccentric camsmounted on the rod, one cam engaging the support near one outer edge andthe other cam engaging the support near the other outer edge, and ahandle mounted on the outside of the typewriter for rotating said rod.

11. In a typewriter, two members movable with reference to each other inpredetermined dileotions, a cam mounted on one member and engageablewith the other member for moving said other member, and a flat springinterposed between said members.

12. In a typewriter, two members movable with reference to each other inpredetermined directions, a cam rotatably mounted on one member andengageable with the other member for moving said other member, and aflat spring interposed between said members.

13. In a typewriter, two members movable with reference to each other inpredetermined directions, a cam rotatably mounted on one member andengageable with the other member for moving said other member, and afiat spring interposed between said members and mounted on.

ing said other member, and a fiat spring interposed between saidmembers, said fiat spring having an angled portion mounted on the memberthat mounts the cam.

16. In a typewriter, two members movable with reference to each other inpredetermined directions, an eccentric cam rotatably mounted on onemember and engageable with the other member for moving said othermember, and a flat spring interposed at right angles to and between saidmembers.

17. In a typewriter, a frame, a platen mounted for transverse movementon the frame, a typesystem including type-carriers that slide rearwardsand forwards towards and away from the platen, and a support for thetype-system comprising a unitary casting movable forwardly andrearwardly to adjust the type-system with reference to the platen,ribbon cups formed in said casting, and forwardly and rearwardlyelongated apertures in the bottoms of said cups for permitting movementof the support with reference; to

vertical ribbon-operating shafts in the typewriter.

18. In a typewriter, a frame, a platen mounted for transverse movementon the frame, a typesystem including type-carriers that slide rearwardsand forwards towards and away from the platen, a support for thetype-system slidable forwardly and backwardly, a rotatable cam on thefront of the frame for moving the support toward the platen, and aspring for moving the support away from the platen, to adjust the typeimpression.

19. In a typewriter, a frame, a platen mounted for transverse movementon the frame, a typesystem including type-carriers that slide rearwardsand forwards towards and away from the platen, a support for thetype-system slidable forwardly and backwardly, a cam on the front of theframe for moving the support toward the platen, and a spring for movingthe support away from the platen, to adjust the type impression.

20. In a typewriter, a frame, a platen mounted on the frame, a typesystem including type-carriers slidable substantially horizontally,type-actions, and supporting brackets; and a support for the type-actionmounted in the frame, having two concentric arcuate bars, the front barhaving radial slots for the brackets, and the rear bar having a frontledge for supporting the brackets and having a depending comb providingradial slots for admitting and rigidly maintaining the brackets inoperative position.

21. In a typewriter, a frame, a platen mounted on the frame, a typesystem including type-carriers slidable substantially horizontally,type-actions, and supporting brackets; and a support for the type-actionmounted in the frame, having two concentric arcuate bars, the front barhaving radial slots for the brackets, and the rear bar having a frontledge for supporting the brackets, and having a depending comb providingradial slots for admitting and rigidly maintaining the brackets inoperative position, the support being an integral unitary casting allthe parts of which are so related that all the slots are accessible tomachine cutting tools in manufacture.

22. A single, unitary casting for supporting a pressure type-actionhaving two concentric arcuate bars, the front bar having radial slotsfor the type-action, the rear bar having a front ledge for thetype-action and depending radial slots for maintaining the type-actionin operative position.

23. A single, unitary casting for supporting a pressure type-actionhaving two concentric arcuate bars, the front bar having radial slotsfor the type-action, the rear bar having a front ledge for thetype-action and depending radial slots for maintaining the type-actionin operative position, the connecting parts of the casting havingstraight inner side walls radiating from a point proximal to thegeometrical center of the arcuate bars.

24. In a typewriter, a frame, a platen mounted for transverse movementon the frame, a typesystem including type-carriers that silde rearwardsand forwards towards and away from the platen, a support for thetype-system slidably mounted on the frame, an adjusting screw side, arod transversely and rotatably mounted in the frame, a pair ofsymmetrically positioned eccentric cams mounted on the rod, a camengaging each of said screws, and means for rotating the rod, said meansbeing detachably mounted on one end of the rod and said frame beingapertured at one side to permit the endwise insertion of the rod.

25. In a typewriter, a frame, a platen mounted for transverse movementon the frame, a typesystem including type-carriers that slide rearwardsand forwards towards and away from the platen, a support for thetype-system slidably mounted on the frame, an adjusting screw mounted onthe front wall of the support at either side, and movable wedgesengageable with the adjusting screws.

26. In a typewriter, a frame, a platen mounted for transverse movementon the frame, a typesystem including type-carriers that slide rearwardsand forwards towards and away from the platen, a support for thetype-system slidably mounted on the frame, an adjusting screw mounted onthe front wall of the support at either side, and synchronously movablewedges engageable with the adjusting screws.

27. In a typewriter, a frame, a platen mounted for transverse movementon the frame, a typesystem including type-carriers that slide rearwardsand forwards towards and away from the platen, a support for thetype-system slidably mounted on the frame, an adjusting screw mounted onthe front wall of the support at either side, and means forsimultaneously engaging both screws and moving the support.

28. In a typewriter, a frame, a platen mounted for transverse movementon the frame, a typesystem including type-carriers that slide rearwardsand forwards towards and away from the platen, a support for thetype-system slidably mounted on the frame, an adjusting screw mounted onthe front wall of the support at either side, wedges engageable with theadjusting screws, and means external to the typewriter for moving thewedges.

29. In a typewriter, a frame, a platen mounted for transverse movementon the frame, a typesystem including type-carriers that slide rearwardsand forwards towards and away from the platen, a support for thetype-system slidably mounted on the frame, an adjusting screw mounted onthe front wall of the support at either side, a pair of arms, a wedgemounted on the outer end of each arm and engaging the head of theadjacent adjusting screw, and means for synchronously adjusting saidarms.

30. In a typewriter, a frame, a platen mounted for transverse movementon the frame, a typesystem including type-carriers that slide rearwardsand forwards towards and away from the platen, a support for thetype-system slidably mounted on the frame, an adjusting screw mounted onthe front wall of the support at either side, a pair of arms, a wedgemounted on the outer end of each arm and engaging the head of theadjacent adjusting screw, and means for synchronously adjusting saidarms, mounted on the outside of the machine.

31. In a typewriter, a frame, a platen mounted for transverse movementon the frame, a typesystem including type-carriers that slide rearwardsand forwards towards and away from the platen, a support for thetype-system slidably mounted on the frame, an adjusting screw mounted onthe front wall of the'support at either side, a pair of arms, a wedgemounted on the outer end of each arm and engaging the head of theadjacent adjusting screw, and means for synchronously adjusting saidarms, mounted on the front wall of the machine,

32. In a typewriter, a frame, a platen mounted for transverse movementon the frame, a typesystem including type-carriers that slide rearwardsand forwards towards and away from the platen, a support for thetype-system slidably mounted on the frame, an adjusting screw mounted onthe front wall of the support at either side, a pair of arms, a wedgemounted on the outer end of each arm and engaging the head of theadjacent adjusting screw, the inner ends of said arms having teeth, acircular rack having teeth engaging said teeth on both arms, and meansfor rotating the circular rack.

33. In a typewriter, a frame, a platen mounted for transverse movementon the frame, a typesystem including type-carriers that slide rearwardsand forwards towards and away from the platen, a support for thetype-system slidably mounted on the frame, an adjusting screw mounted onthe front wall of the support at either side, a pair of arms, a wedgemounted on the outer end of each arm and engaging the head of theadjacent adjusting screw, the inner ends of said arms having teeth, acircular rack having teeth. engaging said teeth on both arms, and acrank for rotating the circular rack.

34. In a typewriter, a frame, a platen mounted for transverse movementon the frame, a typesystem including type-carriers that slide rearwardsand forwards towards and away from the platen, a support for thetype-system slidably mounted on the frame, an adjusting screw mounted onthe front wall of the support at either side, a pair of arms, a wedgemounted on the outer end of each arm and engagingthe head of theadjacent adjusting screw, the inner ends of said arms having teeth, acircular rack having teeth engaging said teeth on both arms, a crank forrotating the circular rack, and means, for holding the crank in aplurality of positions.

35. The combination with a platen and a set of front strike type-bars ofthe class described, a main frame, and a segment whereon the typebarsare mounted in front of the platen, of adjustable wedges mounted atopposite sides of the main frame and co-operating with a pair ofinclined surfaces at the ends of said segment, an adjuster at the frontof the machine, means connecting said adjuster to said adjustable wedgesto effect similar backward or forward adjustment at the ends of saidtype-bar segment, and means tending to retain the segment whereadjusted.

36. The combination with a platen and a set of front strike type-bars ofthe class described, a main frame, and a segment whereon the type-barsare-mounted in front of the platen, of adjustable wedges mounted at'oppos'te sides of the main frame and co-operating with a pair ofinclined surfaces at the ends of said segment, an adjuster at the frontof the machine, and a. pair of links extending from said wedges toeachother and having racks at their adjacent ends, said adjuster having apinion engaging both racks for simultaneous equal adjustment of thewedges.

3'7. The combination with a platen and of front strike type-bars of theclass described, a main frame and a segment whereon the typebars aremounted in front of the platen, of adjustable wedges mounted at oppositesides of the main frameand co-operating with a pair of inclined surfacesat the ends of said segment, an adjuster at the front of the machine, apair of links extending from said wedges to each other and having racksat their adjacent ends, said adjuster having a pinion engaging bothracks for simultaneous equal adjustment of the for mechanicallydetaining said adjuster at a plurality of equally spaced stations, forregulating the extent of adjustment of the segment.

38. The combination with a platen and a set of front strike type-bars ofthe class described, a main frame, and a segment whereon the typebarsare mounted in front of the platen, of adjustable wedges mounted atopposite sides of the main frame and co-operating with a pair of screwscarried at the ends of said segment, an adjuster at the front of themachine, a pair of links extending from said wedges to each other andhaving racks at their adjacent ends, said adjuster having a pinionengaging both racks for simultaneous equal adjustment of the wedges,means for mechanically detaining said adjuster at a plurality of equallyspaced stations, for regulating the extent of adjustment of the segment,turning of either of said screws being effective to vary the relation ofthe wedges to said segment independently of said adjuster.

39. The combination with a platen, a set of type-bars, and a type-barsegment, said platen and said segment being relatively adjustable tovary the type impressions, or to accommodate different packs ofwork-sheets, of an inclined plane at each side of the type-bar segment,and a pair of wedges to co-operate with said inclined planes to vary therelative position of the platen and the printing types at the typeimpactposition.

40. The combination with a platen, a set of type-bars, and a type-barsegment, said platen and said segment being relatively adjustable tovary the type impressions, or to accommodate different packs ofworkheets, of an inclined plane at each side of the type-bar segment, apair of wedges to co-operate with said inclined planes to vary therelative position of the platen and the printing types at thetype-impact position, and means to effect relative adjustment at eitherone side of the machine or the other, to permit relative truing betweenthe platen and the types, to secure uniformity of type impressionsthroughout the length of the line of typing, said means being adjustablesimultaneously to vary the relative positions of the type and'the platenat theprinting impact, so as to accommodate work-sheets for manifoldingas required.

41. In a typewriter, a frame, a platen mounted for transverse movementon the frame, a typesystem including type-carriers that slide rearwardsand forwards towards and away from the aset,

platen, a support for the type-system having opposite tracks,complemental tracks on the frame engageable with the support tracks, andreleasable means engaging the frame tracks to respective sides of thesupport rearwards equidistantly, rotation of said screws effectingadjustment of said support independently of said adjustment means.

43. In a typewriter, a frame, a platen mounted for transverse movementon the frame, a typesystem including type-carriers that slide rearwardsand forwards towards and away from the platen, a support for thetype-system slidably mounted on the frame, a single adjustment meansoperative upon opposite sides of the support for simultaneously slidingthe respective sides of the support rearwards equidistantly, and a pairof springs yieldably urging the respective sides of the supportforwardly in counteraction with the adjustment means.

HARRY C. YAEGER.

